Typing error correction system

ABSTRACT

In a typing error correction system, typing error correction fluid is sprayed from an aerosol spray assembly through an aperture in a mask and onto a typing error. The mask comprises a portion of a spray discharge assembly that receives and supports the aerosol spray assembly. A discharge head mounted in the spray discharge assembly actuates the aerosol spray assembly upon movement of the aerosol spray assembly into the spray discharge assembly, and includes a normally sealed spray discharge passageway which is opened to permit discharge of the spray. A reticular foam collar mounted in the spray discharge assembly absorbs spurious spray, and a viewing port formed through the spray discharge assembly facilitates alignment of the aperture in the mask with a typing error.

United States Patent 1191 Brown 1 Nov. 26, 1974 TYPING ERROR CORRECTIONSYSTEM Primary. ExaminerMichael Sofocleous [76] Inventor: William E.Brown, 413 Fall Creek fif i Agent Hams Dr., Richardson, Tex. 75080 e[22] Filed. Apr. 14, 1972 ABSTRACT [21] App]. No.: 244,299

I In a typing error correctlon system, typing error Corla 5- Appli ionDatav rection fluid is sprayed from an aerosol spray assembly [62] ivi if s No, 543 3 J l 13 1970 PM, through an aperture in a mask and onto atyping error.

3,756,514. The mask comprises a portion of a spray discharge assemblythat receives and supports the aerosol spray [52] U.S. Cl. 117/2 TC, 117/38, 1 17/104 R, assembly. A discharge head mounted in the spray dis-239/350 charge assembly actuates the aerosol spray assembly [51] Int. Cl.Q B32b 35/00 upon movement of the aerosol spray assembly into the [58]Field of Search 117/2 R,2 TC, 2, 38, 104 R; spray discharge assembly,and includes a normally 239/350, 288; 222/182, 402 B, 571 sealed spraydischarge passageway which is opened to Y permit discharge of the spray.A reticular foam collar [56] References Cited mounted in the spraydischarge assembly absorbs spu- UNITED STATES PATENTS rious spray, and aviewing port formed through the 3,276,870 10/1966 Bitting et al. 117/2TC spray dis9harge assembly faciliiates alignment of the 3,459,1278/1969 Barouh 117/2 TC aperturel" the mask a tYPmg error- 3,572,59l3/l97l Brown V 239/337 5 Claims, 1 Drawing Figure TYPING ERRORCORRECTION SYSTEM This appliation is a division of application Ser. No;

system, and more particularly .to a system for spraying typing errorcorrection fluid onto typing errors.

At the present time, a variety of typing error correction systems are inuse. Perhaps the oldest system is the conventional eraser, whichoperates-to remove the error. Morerecently, systems for covering typingerrors have been developed. I

In accordance with one error correction system in which errors arecovered, a white film is applied to one side of a length of plastictape. The tape is positioned over a typing error and the keycorresponding to the error is struck. As the type pallet strikes thetape, the error is covered by film from the tape.

Another error correction system of the error covering type comprises asmallcontainer of typing error correction fluid. Fluid from thecontainer is applied to typing errors by means ofa small brush.Presently available systems of this type are less than whollysatisfactory because the brush does not provide adequate control overeither the amount of fluid applied or the area of application, and oftenleaves a brush streaked finish. Also, typing error correction fluidtends to thicken and it is often necessary to add a solvent to the fluidin order to restore its original consistency,

The present invention comprises a typing error correction system inwhich typing error correction fluid is applied in spray form. The systemincludes an aerosol spray assembly that delivers a measured amount oftyping error correction fluid. The fluid is applied to a typing errorthrough an aperture that corresponds in size and shape to a typedcharacter. Thus, both the quantity of fluid applied and the area ofapplication are optimized, and the correction has a superior appearance.Also, because the typing error correction fluid is stored inan aerosolassembly, the use of the invention eliminates the problem of fluidthickening. I

A more complete understanding of the invention may be had by referringto the following detailed description when taken in conjunction with thedrawing, which comprises a partial sectional view of a typing errorcorrection system employing the invention.

Referring now to the drawing, a typing error correction system employingthe present invention is shown. The correction system 10 includes aspray discharge assembly l2 and an aerosol spray assembly 14. Theaerosol spray assembly 14 includes a can 16 of the type commonlyemployed in aerosol spray containers, and a valve assembly 18.

The can 16 of the aerosol spray assembly 14 contains approximately equalquantities by weight of a typing error correction fluid and an aerosolpropellant. The typing error correction fluid preferably comprises oneof the commercially available varieties. For example, a suitable typingerror correction fluid is identified as Federal Specification O-C-0065Oand is formed by mix-' ing l 1.7 pounds titanium dioxide pigment, 23.8pounds TICIZER 140, 23.3 pounds isopropyl acetate and 23.5 poundstoluol. Similarly, the aerosol propellant preferably comprises one ofthe commercially available aerosol propellants. For example, thepropellant may comprise FREON 12", a mixture ofFREON l1 and FREON 12 ora mixture of FREON 12 and FREON 114, all of which are sold by E. l.duPont deNemours and Co., Inc. In accordance with conventional aerosolpropellant formulating practices, the propellant may further includenitrogen, butane and/or propane, if desired. The can 16 may also containone of the commerically available aerosol paints. For example, theaerosol paint manufactured by the Illinois Bronze Powder & Paint Co., ofLake Zurich, Illinois and identified as No. 150 Soft White may beemployed in the practice of the invention.

The valve assembly 18 of the aerosol spray assembly 14 is alsoconventional in design. Preferably, the valve assembly 18 comprises oneof the commercially available metering valve assemblies, and thereforedischarges a prdetermined quantity of typing error correction fluid andpropellant upon each actuation of the aerosol spray assembly 14. Forexample, a metering valve assembly similar to the valve assembly sold bythe Valve Corporation of America and identified as Model B18F may beemployed in the aerosol spray assembly 14. When the above-identifiedaerosol paint is contained in the can 16, the valve assembly 18 is soconstructed that approximately 50 milligrams of aerosol paint isdischarged upon each actuation ofthe aerosol spray assembly 14.

The spray discharge assembly 12 includes a cylindrical housing 20 whichreceives, supports and retains the aerosol spray assembly 14. Adischarge head 22 is mounted in the housing 20 adjacent the valveassembly 18 of the aerosol spray assembly 14. A discharge passageway 24is formed through the discharge head 22, and extends from a valveactuating tube 26 mounted on the lower end of the valve assembly 18 to aclosure nipple 28 formed at the lower end of the head 22. The passageway24 may include an expansion chamber for modifying the spray pattern ofthe aerosol spray assembly 14. The tube 26 comprises an actuatinglinkage for the valve assembly 18 of the aerosol spray assembly 14 and,accordingly, whenever the assembly 14 is moved into the housing 20, thetube 26 actuates the aerosol spray assembly 14, whereupon apredetermined quan-. tity of typing error correction fluid andpropellant is discharged through the passageway 24.

The closure nipple 28 of the discharge head 22 is norincluding a coverportion 34 that cooperates with the acrylic resin of the type sold bythe Rohm and Hass Company and identified as ACRYLOlD B-82," 4.8 poundsnitrocellulous of the type sold by the Hercules I Company and identifiedas SSNITROCELLULOSE Va Sec., 2 pounds plasticiser of the type sold bythe Monsanto Chemical Company and identified as SAN- nipple 28 to sealthe passageway 24, and a spring portion 36. The closure member 32 issupported in the housing 20 by a pin 38 that is fixed against rotationrelative to the housing 20. An actuator pin 40 is slidably supported inthe housing 20 and is retained by a collar 42. The pin 40 is positionedin the path of the aerosol spray container 14 as the assembly 14 ismoved into the housing 20. Thus, upon actuation of the aerosol sprayassembly 14 to discharge spray therefrom, the pin 40 engages the closuremember 32 and moves the cover portion 34 out of engagement with theclosure nipple 28 against the action of the spring portion 36. Becauseof the closure assembly 30, typing error correction mensions can beemployed in the practice of the invention, if desired. The mask 44 ispreferably detachably mounted on the housing to permit the use ofapertures 46 of various configurations. Also, the mask is preferablyprovided with pointed projections 48 on its lower surface to assure theproduction of a connection having a feathered edge.

The aperture 46 is positioned to receive spray discharged through thepassageway 21 of the discharge head 22. A reticular foam liner 50 ismounted within the housing 20 to receive and retain any spurious sprayfAlso, a viewing port 52 is formed through the housing 20 and through thefoam liner 28 to facilitate the posi' tioning of the aperture 46 inalignment with a typing error to be corrected.

ln the use of the typing error correction system 10, the aperture 46 inthe mask 44 is aligned with a typing error to be corrected by observingthe error through the viewing port 52 and the aperture 46. When theaperture 46 is properly aligned, the aerosol spray assembly 14 isdepressed relative to the spray discharge assembly 12. As the aerosolspray assembly 14 moves into the housing .20, the pin 40 is engaged andmoved downwardly. The pin 40 engages the closure member 32 and therebymoves the cover portion 34 out of align ment with the nipple 28, againstthe action ofthe spring portion 36.

Upon further movement of the aerosol spray assembly 14 into the housing20, the valve actuating tube 26 of the discharge head 22 actuates thevalve assembly 18, whereupon a measured quantity oftyping errorcorrection fluid and propellant is discharged from the can through thepassageway 24 and through the aperture 46 onto the typing error to becorrected. The valve 18 and the aperture 46 cooperate to deliver exactlythe right quantity oftyping error correction fluid to exactly the rightlocation. Also, because the typing error correction fluid is applied asa spray, and because of the construction of the mask 44, the resultingcorrection is characterized by a smooth finish and feathered edges.

Due to the construction of the valve 18, the same quantity of typingerror correction fluid is discharged regardless of how long the aerosolspray assembly 14 is held depressed. When the assembly 14 is released,the spring portion 36 of the closure member 32 returns the cover portion34 into engagement with the closure nipple 28. The cover portion 34 andthe closure nipple 28 I cooperate to seal the interior of the passageway24. This prevents typing error correction fluid from drying within thepassageway 24, and thereby prevents clogging of the passageway 24 due todry fluid.

From the foregoing, it will be understood that the present inventioncomprises a typing error correction advantageous over the prior art inthat it assures the application of the proper quantity of typing errorcorrection fluid, in that it controls the application of the fluid to adesired area, andin that it results in corrections having a smoothsurface and feathered edges. The use of the system is furtheradvantageous in that the storage of the typing error correction fluid inthe aerosol spray assembly and the sealing of the discharge passagewaywhen the system is not in use eliminate problems caused by drying andthickening of the fluid. The present invention has been described inconjunction with the correction of typing errors. It will be understood,however, that the invention is adapted to other uses. For example,errors in written materials produced other than by typing, such as byprinting, xerography, lettering, etc., can be corrected by means of thepresent invention. Also, changes not strictly classified as errors, suchas numberings, editing, address changes, and the like can beaccomplished expediently when the present invention is used.

Although a single embodiment of the invention has been illustrated inthe drawing and described herein, it will be understood that theinvention is not limited to the embodiment disclosed, but is capable ofrearrangement, modification and substitution of parts and elementswithout departing from the spirit of the invention.

What is claimed is: l. A method of applying a predetermined amount ofmaterial comprising a correction fluid to a predetermined area of asurface having a typing error contained therein and thereby correctingthe error which comprises:

positioning an aperture formed through a mask in alignment with thepredetermined area of the surface having the typing error containedtherein;

thereafter discharging a metered quantity of the material comprising acorrection fluid from an aerosol container thereof across an open spaceseparating the container and the mask toward the aperture in the mask sothat the predetermined amount of the material passes through theaperture and onto the predetermined area and the remainder of themetered quantity of the material is retained; and

thereafter drying the material to form an opaque layer covering theerror and characterized by a smooth surface finish.

2. The method of applying a predetermined amount of material accordingto claim 1 further characterized by the step of collecting overspray ina body of foam material encircling the aperture in the mask.

3. The method of applying a predetermined amount of material accordingto claim 1 further characterized by discharging the material from theaerosol container through a discharge passageway and by normally sealingthe end of the discharge passageway remote from the aerosol containerexcept during the discharge of material therethrough.

4. The method of applying a predetermined amount of material accordingto claim 1 wherein the mask further comprises a housing which receivesthe aerosol container, and wherein the step of discharging a meteredquantity of the material is carried out in response to relative movementof the aerosol container with respect to the housing.

5. A method of correcting typing errors comprising:

3,850,656 v v vt5 positioning an aperture in a mask in alignment witherror to be corrected, thereby covering the error; an error to becorrected; and

thereafter discharging a metered quantity of a corthereafter drying cmaterial to form an Opaque rection fluid comprising an opaque liquidfrom an 1 th d h t d b aerosol container thereof toward the mask so that5 ayer covermg 6 error an 0 Mac enzei y a predetermined amount ofcorrection fluid passes Smooth u e finish through the aperture in themask and onto the

1. A METHOD OF APPLYING A PREDETERMINED AMOUNT OF MATERIAL COMPRISING ACORRECTION FLUID TO A PREDETERMINED AREA OF A SURFACE HAVING A COTYPINGERROR CONTAINED THEREIN AND THEREBY CORRECTING THE ERROR WHICHCOMPRISES: POSITIONING AN APERTURE FORMED THROUGH A MASK IN ALIGNMENTWITH THE PREDETERMINED AREA OF THE SURFACE HAVING THE TYPING ERRORCONTAINED THEREIN; THEREAFTER DISCHARGING A METERED QUANTITY OF THEMATERIAL COMPRISING A CORRECTION FLUID FROM AN AEROSIL CONTAINER THEREOFACROSS AN OPEN SPACE SEPARATING THE CONTAINER AND THE MASK TOWARD THEAPERTURE IN THE MASK SO THAT THE PREDETERMINED AMOUNT OF THE MATERIALPASSES THROUGH THE APERTURE AND ONTO THE PREDETERMINED AREA AND THEREMAINDER OF THE METERED QUANTITY OF THE MATERIAL IS RETAINED; AND 2.The method of applying a predetermined amount of material according toclaim 1 further characterized by the step of collecting overspray in abody of foam material encircling the aperture in the mask.
 3. The methodof applying a predetermined amount of material according to claim 1further characterized by discharging the material from the aerosolcontainer through a discharge passageway and by normally sealing the endof the discharge passageway remote from the aerosol container exceptduring the discharge of material therethrough.
 4. The method of applyinga predetermined amount of material according to claim 1 wherein the maskfurther comprises a housing which receives the aerosol container, andwherein the step of discharging a metered quantity of the material iscarried out in response to relative movement of the aerosol containerwith respect to the housing.
 5. A method of correcting typing errorscomprising: positioning an aperture in a mask in alignment with an errorto be corrected; thereafter discharging a metered quantity of acorrection fluid comprising an opaque liquid from an aerosol containerthereof toward the mask so that a predetermined amount of correctionfluid passes through the aperture in the mask and onto the error to becorrected, thereby covering the error; and thereafter drying thematerial to form an opaque layer covering the error and characterized bya smooth surface finish.